Preston Glenn

Preston J. Glenn was a member of Elizabeth McNeil's expedition to Mars. He worked in the Erebus Labs. During the second demonic invasion, he was transformed into a zombie. The Player encounters him in mid-transformation, during which he frantically warns the Player to keep away from him. Moments later, Preston's transformation is complete and he attacks the Player. Thankfully, once the zombie Preston is killed, his corpse is available to charge the Artifact.

Preston's PDA is needed to access the Archives.

Zombie Preston has much less health than a normal zombie; a single pistol shot to his body is enough to kill him. Therefore, the player would be wise not to use a more powerful weapon than the pistol, so as not to inadvertently gib his corpse and deny themselves an artifact charge.